Driver Display Spd2010 Screen Does Not Turn On

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Introduction

In this article, we will explore the issue of a driver display SPD2010 screen not turning on, despite the code running without errors. We will delve into the possible causes and provide solutions to resolve the problem.

Understanding the Code

The provided code is written in MicroPython and uses the LVGL library to interact with the SPD2010 display driver. The code initializes the display, sets the power to true, and configures the backlight. However, despite the code running without errors, the screen remains unresponsive.

Possible Causes

  1. Incorrect Pin Configuration: The code uses specific pin configurations for the display and backlight. However, it is possible that the pin configurations are incorrect or not properly set.
  2. Display Driver Issues: The SPD2010 display driver may be malfunctioning or not properly initialized, leading to the screen not turning on.
  3. LVGL Library Issues: The LVGL library may be causing issues with the display, preventing it from turning on.
  4. Hardware Issues: The hardware itself may be faulty or not properly connected, leading to the screen not turning on.

Troubleshooting Steps

  1. Verify Pin Configuration: Double-check the pin configurations in the code to ensure they match the actual pin connections on the board.
  2. Check Display Driver: Verify that the SPD2010 display driver is properly initialized and configured. Check the display driver documentation for any specific requirements or settings.
  3. Test LVGL Library: Test the LVGL library separately to ensure it is functioning correctly. Try running a simple LVGL example to see if the display turns on.
  4. Inspect Hardware: Inspect the hardware connections to ensure they are secure and properly connected.

Code Modifications

To troubleshoot the issue, we can modify the code to add additional logging and debugging statements. This will help us understand the flow of the code and identify any potential issues.

import lvgl as lv
import time
import json
from machine import Pin, SPI
import lcd_bus
from spd2010 import SPD2010  # Import the SPD2010 display driver
import display_driver_framework  # Import to access constants like BYTE_ORDER_RGB
import task_handler
import machine
import gc

# Display dimensions for 1.46" display (240x240 is common for this size)
_WIDTH = 240   
_HEIGHT = 240

# LCD pins from schematic
_BL = 1        # Backlight pin (IO1)
_RST = 0       # Reset pin (IO0)
_DC = 42       # Data/Command pin (using IO42/SDA2)
_LCD_CS = 21   # Chip select (IO21)

# SPI pins from schematic
_HOST = 2      # SPI host
_SCK = 40      # Clock pin (LCD_SCK -> IO40)
_MOSI = 46     # Data line 0 (LCD_SDA0 -> IO46)
_MISO = 45     # Data line 1 (LCD_SDA1 -> IO45)

# SPI frequency for the display
_LCD_FREQ = 40000000  # 40MHz

# Añadir después de importar las librerías, antes de configurar el bus SPI
# Secuencia reset manual
if _RST != -1:
    print("Reset pin configured")
    reset_pin = Pin(_RST, Pin.OUT)
    reset_pin.value(0)  # Reset activo (LOW)
    time.sleep_ms(20)   # Mantener reset por 20ms
    reset_pin.value(1)  # Liberar reset
    time.sleep_ms(200)  # Esperar a que el dispositivo se inicialice

# Encender backlight manualmente después de inicializar el display
if _BL != -1:
    print("Backlight pin configured")
    bl_pin = Pin(_BL, Pin.OUT)
    time.sleep_ms(100)  # Esperar antes de encender el backlight
    bl_pin.value(1)     # Encender backlight (asumiendo lógica HIGH activa)

# Configure SPI bus for the ESP32-S3
spi_bus = machine.SPI.Bus(
    host=_HOST,
    mosi=_MOSI,
    miso=_MISO,
    sck=_SCK
)

# Create LCD bus with the SPI bus
# Note: Setting quad=True for quad SPI mode according to the lcd_bus.pyi definition
display_bus = lcd_bus.SPIBus(
    spi_bus=spi_bus,
    freq=_LCD_FREQ,
    dc=_DC,
    cs=_LCD_CS,
    quad=True  # Enable quad SPI mode
)

# Initialize LVGL
lv.init()

# Create the display with SPD2010 driver
print("Initializing SPD2010 display...")
display = SPD2010(
    data_bus=display_bus,
    display_width=_WIDTH,
    display_height=_HEIGHT,
    reset_pin=_RST,
    backlight_pin=_BL,
    color_space=lv.COLOR_FORMAT.RGB565,  # Using RGB565 color format
    color_byte_order=display_driver_framework.BYTE_ORDER_RGB,  # Use the constant from display_driver_framework
)

# Turn on and configure the display
print("Turning on display...")
display.set_power(True)
display.init()
display.set_backlight(100)  # 80% brightness

print("Display initialization complete")

Conclusion

Q: What are the possible causes of a driver display SPD2010 screen not turning on?

A: The possible causes of a driver display SPD2010 screen not turning on include:

  • Incorrect pin configurations
  • Display driver issues
  • LVGL library issues
  • Hardware issues

Q: How can I troubleshoot the issue?

A: To troubleshoot the issue, you can:

  • Verify the pin configurations in the code to ensure they match the actual pin connections on the board
  • Check the display driver documentation for any specific requirements or settings
  • Test the LVGL library separately to ensure it is functioning correctly
  • Inspect the hardware connections to ensure they are secure and properly connected

Q: What are some common mistakes that can cause the display not to turn on?

A: Some common mistakes that can cause the display not to turn on include:

  • Incorrect pin configurations
  • Incorrect display driver settings
  • Incorrect LVGL library settings
  • Hardware issues such as loose connections or faulty components

Q: How can I modify the code to add additional logging and debugging statements?

A: To modify the code to add additional logging and debugging statements, you can:

  • Add print statements to the code to output the values of variables and the flow of the code
  • Use a debugger to step through the code and inspect the values of variables
  • Use a logging library to log the output of the code

Q: What are some best practices for debugging and troubleshooting the issue?

A: Some best practices for debugging and troubleshooting the issue include:

  • Use a systematic approach to troubleshoot the issue
  • Use a debugger to step through the code and inspect the values of variables
  • Use a logging library to log the output of the code
  • Verify the pin configurations in the code to ensure they match the actual pin connections on the board
  • Check the display driver documentation for any specific requirements or settings

Q: How can I ensure that the display turns on correctly?

A: To ensure that the display turns on correctly, you can:

  • Verify the pin configurations in the code to ensure they match the actual pin connections on the board
  • Check the display driver documentation for any specific requirements or settings
  • Test the LVGL library separately to ensure it is functioning correctly
  • Inspect the hardware connections to ensure they are secure and properly connected

Q: What are some common issues that can cause the display not to turn on?

A: Some common issues that can cause the display not to turn on include:

  • Incorrect pin configurations
  • Incorrect display driver settings
  • Incorrect LVGL library settings
  • Hardware issues such as loose connections or faulty components

Q: How can I prevent the issue from occurring in the future?

A: To prevent the issue from occurring in the future, you can:

  • Verify the pin configurations in the code to ensure they match the actual pin connections on the board
  • Check the display driver documentation for any specific requirements or settings
  • Test the LVGL library separately to ensure it is functioning correctly
  • Inspect the hardware connections to ensure they are secure and properly connected

Q: What are some resources that can help me troubleshoot the issue?

A: Some resources that can help you troubleshoot the issue include:

  • The display driver documentation
  • The LVGL library documentation
  • Online forums and communities
  • Debugging and troubleshooting tools such as a debugger and a logging library